Rangel is losing to the Green in NY-13!
You can't conclude that. There are two candidates running against Rangel - Working Families Party candidate Kenneth Schaeffer and Green Party candidate Daniel Rivera. Best I can tell, YouGov didn't separately poll the two candidates - or, at least, didn't release results with the candidates separated out. They could be splitting the anti-Rangel vote. Plus, the MoE is +/-15 with 20% undecided, which makes the poll pretty useless.
YouGov also seems to have allowed voters to choose "Other" in the two NYC-area districts where Democrats are running totally unopposed - NY-06 (Meng) and NY-16 (Engel). I suppose some registered Republicans and Conservatives will write somebody in. But most offended Republicans and Conservatives will likely just skip over the race altogether. As far as I know, there's no organized write-in campaign in either district. So I doubt 14% of NY-06 voters write in someone other than Meng, as YouGov's polling suggest. Ditto in NY-22 Upstate where Republican Hanna is unopposed.
FYI - the official New York State candidate list is
here.